Pics of buds/cola's?
Well I certainly wouldn't harvest before Wednesday lol. Depends, is your grow close enough that you could get any fans going? Moving air helps a ton. Also if close, could you not move them indoor or put a make shift covering above them? I've had to chop early bc budrot and though the herb still got me high, man I wish it would've gotten to mature.
What's humidity forecast sat-monday? What is it expected to be from now till Wednesday before the expected rain?
If RH is gonna be 60% or less before and after, absolutely wait and do what you can to mitigate direct rain.